Malicious PDF — malware analysis report

Static analysis result for SHA-256 0270d66c9a079ef6…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 10:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ade31abf08019599475450292d8c8770 SHA-1: 96855027923482873230f8dee889a6df50af04b7 SHA-256: 0270d66c9a079ef6f53ce25695b505012d0b7f24149520bcb0691ead83b45f56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the same malicious URL, suggesting an attempt to direct users to harmful content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=anti+anemic+drugs+pdf
    • http://files.booksncraftsbymaryelizabeth.com/uploads/1/3/1/4/131453045/906527.pdf
    • http://files.ethicsgeneral.com/uploads/1/3/2/6/132681450/gisalu_vesamomu_puwonesijugibe_razaz.pdf
    • http://files.pemichoral.org/uploads/1/3/1/4/131437131/b5fbabaa484bf.pdf
    • http://files.jstortenbeckereducation.com/uploads/1/3/1/0/131070604/944b820ddd797.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/rifomikutuxufokuxikilimus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/brm_projects.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/24938510384.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/ret_paladin_stat_priority.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/attack_on_titan_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/xivujedusoreli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/cessna_310q_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/96039415640.pdf
    • https://cdn.shopify.com/s/files/1/0433/3512/3102/files/kediz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/zixivekam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632c.bin
1c3935aa0cc15f8924130e0cd8eab13a0c01cf57c3fb574c0d3c58d76a74e25a
pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5432 bytes
font_01_sfnt_off0000758e.bin
352d0cd603ec0d82ffe19f4e8418885de76857feac2e2f31d2efcd51776bdd87
pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 10224 bytes